Hardware
Interface
23
Rear Panel Features
Video Inputs
The Image Server records video on channel #1. It has separate BNC inputs for SDI
(serial digital per SMPTE 259M) and analog video (CVBS) signals. Both video inputs have a
fixed 75-ohm termination. The graphic user interface selects between the two. Encoding is
performed in MPEG-2 format within the server.
Video Outputs
Video outputs are provided in SDI and Composite (CVBS) formats simultaneously.
Digital video appears in SDI format at 270 Mb/s and conforms to SMPTE 259M. Analog video
is composite (CVBS).
Audio I/O
The Image Server provides audio inputs and outputs in three formats:
•
Balanced analog audio at a reference level of +4 dBu.
•
Digital audio in AES/EBU format per AES-3-2000.
•
SDI embedded audio, 4-channels
These multiple standards facilitate the transition from an analog studio to digital
production and broadcasting, and ensure that the server can operate with most equipment.
Note that both
analog and AES/EBU audio signals are not available at the same time
on a given
input or output. Internal jumpers select between analog or digital; however, each pair of inputs
and outputs can be set up differently, if desired. A set of XLR-3 connectors allows high-quality
connections to be made in either format. Embedded audio appears in the SDI output stream at
all times.
Analog Audio Capability
When the analog audio input format is selected, each video channel has two audio
channels, recorded together as a stereo pair. Internal trimmers allow adjustment to unity gain.
Digital Audio Capability
When AES/EBU digital audio is selected, each video channel has four audio channels,
which are recorded as two stereo pairs. Because a single XLR connector carries a
stereo pair
in
AES/EBU format, and only
one (monaural) channel in analog, the server provides an extra pair
of audio channels when used with AES/EBU audio signals.
Embedded Audio Capability
When SDI embedded audio is selected, four audio channels are available for recording.
Embedded audio is always inserted in the video outputs. Note that discrete audio (analog or
Summary of Contents for MAXX
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